George t



(No Model.)

G. T. CHAPMAN.

v VEHICLE SPRING. No. 512,501. Patented'Jan. 9., 1894.

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WASMXNGTON. n. c.

and bolster.

UNITED STATES FFICE.

PATENT GEORGE T. CHAPMAN, OF NEW YORK, N. Y., ASSIGNOR TO WILLIAM HARVEY MERRITT, OF SAME PLACE.

SPRING.

SPEGIFICATION forming part of Letters Patent No. 512,501, dated January 9, 1894.

Application filed February 6, 1893.

T0 at whom it may concern.-

Be it known that I, GEORGE T. CHAPMAN, a citizen of the United States, and aresident of New York city, in the county and State of New York, have invented certain new and usefullmprovements in Up-Thrust Retarders for Vehicle-Springs, of which the following is a specification.

My invention consists of an attachment for retarding and limiting the up thrusts of the body supporting springs, the objects of which are to afford easier riding carriages, to lessen the lateral rocking motion, and toprotect' the springs from breaking, all as hereinafter fully described, reference being made to the accompanying drawings, in which Figure 1, is a front elevation of a bolster, cross spring, and end of a body supported on the spring with up thrust retarders applied in accordance with my invention. Fig. 2, is a like view of the same parts of a wagon with retarders of modified form. Figs. 3 and 4., are side elevations of the retarders represented in Fig. 1, and ,sections of the spring Figs. 5 and 6, are side elevations of the retarders represented in Fig. 2, and sections of the spring and bolster.

The invention applies mainly to wagons in which the body a, is mounted on the ends of semi-elliptical springs 17, seated at the crown of the convex side on the bolster 0, but is applicable to elliptical springs having the body otherwise mounted.

At d, I represent a yoke the ends-of which are pivoted to the bolster at e, or it may be rigidly fastened to the bolster with the bow of the yoke extending over the spring and holding it a little lower than it would be in its normal position, so that the spring is checked and prevented from rising too high through the efiect of severe up thrusts, or by the spring being unduly depressed at the other side of its support on the bolster, to prevent the body from rocking. At f, I represent a like yoke rigidly fastened to the bolster and having a spring arm 9, extending from the bow along the upper surface of the spring toward the end, and at its extremity bearing on the-spring as a reinforcing attachment to check and retard the up thrusts of the spring,

Serial No. 461,290- (No model.)

said end of the arm also bearing the spring a little below the normal position. At his a like yoke With an arm 11, jointed to the bow of the yoke with a knuckle or rule joint j, allowing the arm to rest at its other extremity on the spring, but opposing the rise of the spring above the predetermined altitude, and

at k I represent a yoke pivoted to the bolsterand spring and having its members jointed at Z, so that it will articulatefreely when the spring is depressed, but will check the up thrusts when extended to its limit. This articulated yoke jointed to both the bolster and the spring permits unlimited down movement of the body and may therefore be connected to the spring nearer the end than the other rigid yokes, the upper ends of which must not rise above the lowest point the body is to reach. The arms g, 1:, of the yokes f, h, are employed to take effect higher up on the spring than it is feasible for the rigidly fixed yokes to act without interference with the down movements of the body. If the yoke d, is rigidly attached to the bolster the body may have a recess m, in the bottom to prevent striking.

It will be noticed that while the yokes check the springs positively at the points where the springs have contact with the yokes, the ends of the springs are free to rise a limited extent after such contact and thus avoid the abrupt positive stop such as occurs where the upper member of an elliptic spring or the body is linked or strapped to the bolster so that all rising movement is positively prevented when the limit of extension of the links or straps is reached.

I claim- 1. The combination with the bolster and spring, of checking and retarding yokes attached to the bolster, and looped over the spring at intermediate points between the bearing of the spring on the bolster and the ends of the spring, limiting the rise of the spring at the poin ts of contact with the yokes, but permitting farther rise of the ends of the spring substantially as described.

2. The combination with the bolster and spring, of checking and retarding yokes attached to the bolster and looped over the 10 the bolster and spring at intermediate points between the bearing of the spring on the bol- I steer and the ends of the spring, limiting the rise of the spring at the points of contact with the yokes but permitting farther rise at the ends of the springsubstantially as described.

Signed at New York city, in the county and State of New York, this 17th day of January,

GEO. T. CHAPMAN. Witnesses:

W. J. MORGAN, C. E. WHITNEY. 

